The seat occupancy mat is a sensor located in the front passenger seat. This emulator simulates the presence of an occupant with a fastened seat belt. For proper operation, a diagnostic tool (such as Autel, Bosch, iCarsoft, etc.) is required to clear existing error codes from the airbag control unit caused by a faulty seat mat. Once the emulator is installed, use the diagnostic tool to reset the stored faults and turn off the SRS/airbag warning light. Note that errors related to safety systems cannot be cleared automatically. Before purchase, scan your vehicle using a diagnostic tool to confirm the SRS/airbag warning is due to a defective seat occupancy mat. Name: Car Seat Occupancy Mat Sensor SRS Bypass Emulator Fitment Type: Direct Replacement Install Condition: 3+2Pin 2 Heads Fitment: for C-Class W203 Saloon/Sedan (2000�C2004) before facelift Color: As Shown Material: Plastic Package Contents: 1 x Car Seat Bypass Emulator Sensor Only the above package content is included; other items are not included. Note: Light reflection and different display settings may cause slight color variations between the image and the actual product. Measurement may vary by +/- 1�C3 cm.